Daihatsu F300 Service Manual page 1287

ENGINE MECHANICALS
(3) Check the oil pump relief valve for damage.
Replace the relief valve if
it
exhibits damage. Also,
check to see
if
any damage is present at the relief valve
installation hole of the oil pump body.
(4) Check the compression spring for damage. Also,
measure its free length.
Specified Free leng1h: 57 mm
Replace the compression spring if it exhibits damage
or the free length is Jess than the specified value.
(5) Check the oil pump relief valve spring retainer for
damage.
Replace the retainer
if it exhibits damage.
(5) Apply engine oil to the oil pump relief valve. Insert the
oil pump relief valve into the oil pump body. Check to
see
if
the valve slides smoothly.
Replace the oil pump body if the valve fails to slide
smoothly.
7. Measurement of body clearance, tip clearance and side
clearance
(1) Apply a thin fi!in ot engine oil to the rotor mate suriace
of the orl pump body as well as to the rotor set.
As-
semble the rotor set in the oil pump body in such a way
that the drilled mark may be seen from the outside.
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